Switchboard.



1, P. HAYES,

SWITCHBOARD.

APPLICATION FILED MAY-2l. 1914.

1,234,471 Patented July 24, 1917.

4 SHEETS-SHEET l.

FIL-L1- FH12.l

1. P. HAYES.

SWITCHBOARD.

APPLICA-NON FILED MAY 2;.1914.

4 SHEETS-SHEET 2.

g; Fl EA Patented July 24, 1917.

FIIlEI,-

J. P. HAYES.

SWITCHBOARD.

APPLICATION FILED MAY2I, 1914.

1,234,471. Patented July 24, 1917.

0 4 SHEETS-SHEET a. 7

W'TNESSES I7 INvENToR J. P. HAYES.

SWITCHBOARD.

APPLICATION FILED MAY 21. 1914. 1,234,471. Patented July 24, 1917.

4 SHEETS-SHEET 4. ,06 F l E EI- WITNESSES Y UNITED sTATEs PATENT oEEicE.

JOHN P. HAYES, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR F ONE-ALF TO JOHN E. BARNHART, OF PITTSBURGH, PENNSYLVANIA.

etc., from the face of the switch SWITCHBOARD.

Specification of Letters Patent.

Patented July 24, 1917.

Application led May 21, 1914. Serial No. 840,000.

To all whom z't may concern.' t

Be it known that I, JOHN P. HAYES, a citi- Zen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Switchboards, of which the following is a specification.

My invention relates toimprovements in electric switch boards or mountings for carrying various elements of such a construction adapted for receiving and distribution of electrical circuits.

The objects in view are to construct such an apparatus in a simplehcompact and readily available form, providing ample room and capacity for attachment and connection of the various conductor elements, to eliminate conductor material, such as switches, board, to reduce or eliminate the amount of copper and insulating material, such as marble, slate, etc., heretofore used as a mounting for the switches, to make the switches direct acting upon and coperativev with the main bus bars, thereby eliminating any sub bus bars ordinarily used for conducting the circuits from the main bus to the distributing branch switches.

One of the objects in view is to practically eliminate the dierences of potential between adjacent switch blades, and to economically utilize the bus bars both electrically and mechanically.

A further object is to insure safety by eliminating exposed conductor parts from the face of the board and effect a general economy as regards material, workmanship and space over switch boards as heretofore constructed and used.

Other novel features and elements of the invention will be hereinafter discussed and appreciated and understood by those skilled in the art, as hereinafter described and pointed out in the claims.

In the accompanying drawings, I have shown certain referred arrangements and constructions ofD the switch board apparatus embodying the invention so as to give a full understanding of its construction and operation, but desire to have it understood that the arrangement and construction as shown may be varied from without departing from the scope of the invention.

In the drawings,-

Figure l is a front view of the switch board, showing three tiers of switches, a portion of the middle moved.

Fig. 2 is a view of the switch board in side or edge elevation, the middle panel being in vertical section on the line II. II. of Fig. Al.

Fig. 3 is an enlarged vertical sectional view similar to such sectional part of Fig. 2, showing the several parts more clearly in detail and of blades.

Fig. 3L is a similarsectional detail view, showing a continuous insulating support.

Fig. 4 is a detail view of one of the switch yokes showing plural or multiple composite blades.

Fig. 5 is a perspective view of a portion of the bus bar with several switch clip contacts mounted thereon.

Fig. 6 is a detail sectional view on the line VI. VI. of Fig. 5.

Fig. 7 is a perspective view showing a number of the individually rotatable switch elements mounted upon their supporting shaft. v

Fig. 8 is a diagrammatic illustration of a switch board and the circuit connections therewith illustrating'an operative installation.

Figs. 8a to 8t inclusive, are detail views of the rotatable switch blade element, showing different arrangements and numbers of blades.

Figs. 9 and 10 are diagrammatic representations showing applications of the invention to operating circuit conditions.

The frame of the switch board, which may be of suitable metallic elements as angle iron or the like, is generally rectangular or boxlike in form having corner pieces 2, suitably braced and connected and preferably closed across its front at intervals by covers or boards 3 of any suitable construction, or material. The frame as thus constructed is adapted to support a series of assembled individual rotatable switch elements, each having a yoke 4, and a suitable operating handle 5, mounted upon a cross shaft 6 rigidly carried in suitable mountings 7 7 at each end.

The yokes 4, which are of insulating material, are separated from each other by intervening adjustable clamping abutments 8, and are provided with the series of blades9, l0 and 11, extending .generally radially from the central portion of the yoke 4.

panel having been recircuit therewith by blades 9, 10 and 11, the

Between the clamping abutments 8 and each yoke Llare inserted one or more bearing washers 12, the abutments being provided vfor the purpose of alining the blades 9, 10,

a mounting for the contacts, bracket arms 18 are incorporated with the frame structure, at the desired angle or position.

Upon such brackets are mounted insulat ing or nonconducting supporting standards 20, 21, 22, respectively, for the contacts, upon which standards the contacts are mounted or secured in any suitable manner.

Bus bars 24, 25, 26 are interposed between the insulating mounts 20, 21, 22, at their inner edges adjacent the rotatable blade yokes, to which bus bars the adjacent switch clips 16 are secured, adapted to be placed 1n switch clips 17 being spaced beyond clips 16, upon the standards 20, 21, 22, each having a binding post 40.

While clips 16 and 17 may be secured to the bus bar and mounting in any suitable manner, a bolt 16"El may be used to good efect, as shown in Fig. 6. To insure fixed positioning of clip 16 on the bus bar, it may be provided with an embracing base extension 16b as in Fig. 6 and folded around the edge of the bus bar and providing an additional holding section for the bolt.

Mounted upon the frame, in suitable position for connection with the binding posts 410, are insulating fuse panels 30, 31, 32 respectively, each provided with the spaced fuse sockets o r clips 33, 33, adapted to receive the communicating fuse 35.

The inner fuse mounting 33 is connected with the outer blade clip 17 and its binding post 40 by a conductor 38, the consumption circuit, for the fuse connection, being through a circuit conductor 37, attached by binding posts 37.

It will be understood that 'the insulating supports 20,21, 22, for the busbars and switch clips may be arranged or disposed in any desired width, so that the separate fuse mountings 30, 31, 32, may be dispensed with, and the fuses mounted directly thereon as in Fig. 3a. In this figure the parts are indicated by corresponding numerals having the exponent d.

In the drawings showing the general arrangement of the invention, I have illustrated a series of three tiers of switches mounted on the face of the board. Thus, the rst tier is represented by the several letters a, In, c, d, e, 7", g, respectively; the second tier by letters it, z', y', lo, Z, m, n; the third tier by'letters 0, p, g, r, s, t.

The bus bars 24, 25, 26 of the rst tier, in-

This arrangement is clearly disclosed in ,the diagrammatic showing, Fig. 8. Switches. s, are individual switches, operating independent of the bus bars, and which can be connected to operate on different voltages. Switch s is for. a two \wire double ole, and switch t is for afour wiresystem ouble pole per phase.4 The object 1n so illustrating the individual switches s, t, operating independently of the bus bars,` is to show that switches to operate on lvarious voltages may be installed` on the board without any diiculty. i l

The illustration of the three tiers, mounted and arranged in the manner labove described, clearly shows the compactness'with which the switches can be arranged. For instance, in switch n, the blade 9 closes in bus bar clip 16 and clip 17 on the same movement, on standard 20. Blade 10 closes in bus bar clip 16 and clip 17 on standard 21 on the same movement, and blade 11 closes in bus bar clip 16 and clip v17 on standard 22 on the same movement All the switches on the first and second tiers close, as above described, so that blades of the adjacent switches which are side by side, a, b, o, d, etc., are of the same polarity, consequently the diierence -`of potential between all the switch blades side by side is practically. zero. For illustration, let it be supposed that the switch elements A0L to 1 may be placed in one continuous tier and the bus bars 24-25--26 run the full length so that the switch blades of the said switch elements connect thereon. It will then be seen that the individual switches s, t; bear no relation to the invention except to show that individual switches may be installed on the switch board neatly and compactly.

In the drawing, the arrangements as to the fuse connections are similar. Each polarity'of a tier has a fuse panel 30, 31, 32, indicated by the proper signs, and in the same manner as the switch blades all the adjacent .fuses side by side are of the same polarity, (see Fig. 2). As shown in the sectional illustration, Fig. 2, one of the switches is open.v v

It will readily be seen that by using switches with blades 9 and-11 alternately dispensed with, as in Figs. 8b and-8d, a two wire distribution from a three wire system may be secured, or by dispensing with the middle blade 10, as in Fig. 8, one may have a two wire distribution of full voltage. In order to show the advantages and facility dicated by the polarity signs :F and for application of the switch board, I illustrate by the diagrams several well-known distributing systems connected thereb By referring to the diagram of Fig. 8, this shows an arrangement of twenty switches, eighteen of which operate on the bus bars, and two independently of the bus bars. In order not to complicate the diagram, only two switches are shown connected, which operate on the bus bars, and one switch operating independently of the bus bars. Switch o is here represented as a main switch, and is closed in circuit with the generators, and energizes all of the bus bars. Switch a is connected as a distributing switch, and is in circuit with motors 64 and lamps 63. Switch t is represented in circuit with a two phase generator 71 and a two phase motor 70, and is a switch of double pole per phase.

Two generators 45, 46 are connected in series, from which lead feeders 47, 4.8, 49, their polarity being indicated by suitable signs. Switch o is represented as the main switch, and when closed, as shown, charges all the bus bars as follows:

Feeder 47 is connected to binding post 40, thence to switch clip 17 through blade 9 and clip 16 to bus bar 24".

From bus bar 24, of the third tier, lts polarity the circuit passes through wire 52 to bus bar 24 of the lower tier of like polarity, and also to bus bar 26', polarity of the middle tier.

Feeder 48 is connected to binding post 40, thence to switch clip 17 through knife blade 10 to bus bar 25, its polarity being indicated by 2F, thence through wire 53 to bus bars 25 of the middle tier and 25 of the lower tier, which indicate like polarities.

Feeder 49 is connected to binding post 40" of the uppermost set, thence to switch clip 17, through blade 11, clip 16, to bus bar 26, its polarity'being indicated by sign, thence through wire 54 to bus bar 24 of the middle tier and bus bar 26 of the lower tier of like polarity.

Switch which numerals 60, 61, 62, indicate the connections, in series with lamps 63 and motors 64. Assuming this circuit to be balanced, the circuit is from generators 45 and 46 to feeder .47, through blade 9 of switch o, through bus bar 24" of the upper tier, through wire 52 to bus 24 of the lower tier, thence through lower switch a clip 16, blade 9, clip 17, fuse 35, to line 60. lhence through the lamps and motors to line 62,' and back to the generator through fuse 35, clip 17, blade 11, clip 16 and bus bar 26 of the lower tier to wire 54 to bus bar 2 6 of the upper tier, to main switch o, clip 16, blade 11, clip 17 to feeder 49 to generators 46 45.

Ihe neutral feeder 48 can be readily traced through the main switch o to wire a is connected to a circuit of' 53, thence through the distributing switch a of the lower tier to line 61, completing the circuit.

In the upper tier of this diagram switch s is a double pole switch having no neutral blade, (Fig. 8c) and for the reason given heretofore and simplification of the diagram is not wired to a circuit.

Switch t is for four wires and is connected to a two phase motor 70. The switch used in this arrangement is illustrated in Fig. 8f. The generator is indicated by numeral 71, from which lead the conductors A, A2, of one phase, and conductors B, B2, of the other phase. The circuits are traced from generator 71 through line 72 to binding post and switch clip 7 3 of switch t through blade 74 to switch clip and binding post 75, fuse 76, line 77 to motor 70. Then back through line 78 to fuse 76 of the lower series of the upper tier, through switch clip 79, blade 80 (one of blades 9), switch clips 81 of switch t through wire 82 to generator 71, completing the circuit of phase A, A2.

The circuit of phase B, B2, is from generator 71 to line 85, through switch clip 86, upper series tier, blade 87, clip 88, fuse 89, to line 90 to motor 70, then back through line 91, fuse 89, switch clip 92, blade 98 (one of blades 9), switch clip 94, wire 95 to enelratclisr 71, completing the circuit of p ase Fig. 9 is a further diagrammatic representation of circuit connections, similar to Fig. 1, showing four switches in which the alternate positive and negative blades are dispensed with, these blades being represented by Figs. 8b and 8d.

Feeders 100, 101, 102 are tapped to bus bars 24a, 25a, 26a, from which the circuits are traced through the switches a, b, c, d, to lamps 103, 104, 105, 106, respectively of each circuit, it being understood that switches of corresponding letters a, a; b, b; etc., are in circuit. Fig. 9 is a diagrammatic illustration of a two wire distribution of a three wire system such as may be connected to the switch board of Figs. 1 and 2. The fuse connections are not shown in the diagram, it being assumed that from the description above given the fuse connections are understood. In this diagram four switches a, t, c, d, are shown. The bus bars 24a, 25a and 26a are shown partly broken away, suiHcient to illustrate the operation. They represent the bus bars 24, 25, 26, of Fig. 2, and it may be assumed that they are positioned and are of the same length thereof. The switches a, b, c, d, which are shown in Fig. 9, represent the alternate plus and minus blades, indicated by numerals 9 and 11, as dispensed with. The blades of the switch elements illustrated in this diagram may be understood by reference to Figs. 8b and 8d. The blades 10 of the switches a, b, c, (Z, which are the neutral blades, Contact on the neutral bus bar 25, the blades 9 of switches a, 0, being the plus blades, contact on the bus bar 24", and switch blades 11 of switches b, d, which are the minus blades, contact on the minus bus bar 26.

Thesupply lines 100, 101, 102 are tapped to bus bars 24", 25" and 26".` The switches a, 2),-0, (Z are shown closed, which close the four lamp circuits 103, 104, 105, 106.-

Switches a, c of bus bar 24a close the lamp circuits 103, 104, through contacts 16, blades 9, contacts 17 through lamps 103, 104 to contacts 17 blades 10, contacts 16, to the neutral bus bar 25a. Switches Z), Z close the lamp circuits 105, 106, from the neutral bus bar 25a through contact 16, blades 10, contacts 17 lamps 105, 106 to contacts 17, blade 11, and contact 16 to minus bus bar 26a.

Fig. 10 is a further diagram of the switch board, showing four switches, K, L, M, N. Ofthese K, L, represent two main switches which connect bus bars 24", 25", 26", to generators 11,0, 111, through machine circuit breakers 112,'113, to switches K, L, of bus bars 26".

M, N, represent two single pole switches, of which N is connected to a motor circuit 114 through the line circuit breaker 115.` Fig. 10 is a diagrammatic illustration of the switch board connected to a plurality of generators and a distribution system wherein there is a common return for a plurality of feeders, as in the usual distribution lfor electric locomotives of certain types. I show one feeder connected which is sufficient to give an understanding of the diagram. The bus bars are represented by numerals 24", 25", 26", arranged 1n the same position and relation as are the bus bars 24, 25, 26 of Figs. 2 and 3. Switches K and L are triple pole switches, as shown in Fig. 8". Switches M, N are single pole switches, as shown in Fig. 8. 24" is the positive bus-bar, 25" the equalizer bus bar, and 26" the negative bus bar. The triple pole switches K, L are shown closed and connectwith the supply lines of generators 110, 111. The supply lines from the said generators, indicated by the plus signs, connect with bus bar 24" through switch contacts 17, blades 9 and contacts 16.

The equalizer lines from the generators 110, 111, indicated by the minus and plus signs, connect with the equalizer bus bar 25" to switch contacts 17, equalizer blades 10, and contacts 16 to bus bar 25".

The supply lines from the generators 110, 111, indicated by the minus sign, connect with bus bar 26" through the generator circuit breakers 112, 113 to switch contacts 17 minus blades 11 and contacts 16 to bus bar 26". The bus bars being thus energized, the circuit from bus bar 24" to 26" can be traced through the blade 9 of the single pole switch N to switch' contact 17, through the feeder circuit breaker 115, thence through the feeder line, which is connected to motors 114, through said motors to return line which is connected to bus bar 26".

Having described my invention, what I claim is:

1. In a switch board, the combination with n a plurality -of longitudinally parallel bus bars lying in laterally and radially divergent non-coincident independent planes each provided with outwardly projecting switch contacts and sim-ilar companion contact devices spaced away therefrom, of a corresponding plurality of co-acting switch blades lying in corresponding laterally dit ver-gent non-coincident independent planes extending transversely across the width of said bus bars and operable tomake and break connection with said contacts.

2. In a switch board, the combination with a plurality of longitudinally parallel bus bars lying in laterally, and radially divergent non-coincident independent planes each provided with youtwardly projecting switch contacts and similar companion contact devices spaced away therefrom, of a corresponding plurality of co-acting switch blades lying in corresponding laterally dij vergent non-coincident independ-ent planes extending transversely across the width of said bus bars and operable to make and break connection with said contacts, and a v rotatably mounted yoke therefor.

3. In a switch board, the combination with a plurality of longitudinally parallel bus bars lying in laterally and` radially divergent non-coincident independent planes each provided with outwardly projecting switch contacts and similar companion contact devices spaced away therefrom, of a rotatably mounted yoke having a corresponding plurality of coacting switch blades lying in corresponding laterally divergent non-coincident independent planes transversely across and operable between adjacent ones of said bus bars and adapted to engage said contacts in pairs.

4. In a switch board,the combination with a plurality of longitudinally arranged bus bars lying invarying laterally and radially divergent non-coincident independent planes and provided with switch contacts, supplemental contacts spaced beyond said contacts, a corresponding plurality of co-acting switch blades operable in similar independent planes at right angles to the longitudinal faces of said bus bars adapted to engage said contacts in pairs, and a rotatably mounted yoke therefor.

5. In a switch board, the combination with a plurality of longitudinally arranged bus bars lying in laterally and radially divergent non-coincident independent planes around a pivoting center and provided with outwardly projecting contacts, supplemental contacts spaced beyond said contacts', a rotatably mounted yoke operable on said pivoting center, and a plurality of switch blades radially arranged on said yoke and operable in similar independent planes at right angles to the longitudinal faces of said bus bars adapted to co-act with said switch contacts.

6. In a switch board, the combination with a plurality of longitudinally arranged bus bars lying in laterally and radially divergent planes around a pivoting center and provided with outwardly projecting switch contacts, supplemental contacts spaced be- ,yond said contacts, a rotatably mounted yoke operable on said pivoting` center, a plurality of switch blades radially arranged on said yoke and operable in planes at right angles to the longitudinal faces of said bus bars adapted to co-act with said switch contacts, and means for supporting the bus bars annularly between said blades and radially beyond the pivoting center of said yoke. y

7. In a switch board, the combination with a vplurality of longitudinally arranged bus bars lying in laterally and radially divergent planes around a pivoting center andV provided with outwardly projecting switch contacts, a rotatably mounted yoke operable on said pivoting center, a plurality of switch blades radially arranged on said yoke and operable in planes at right anglesto the longitudinal faces of said bus bars adapted to co-act with said switch contacts, and means for mounting and supporting said bus bars and switch contacts annularly between said blades and in their path of movement.

8. In a switch board, the combination with a supporting frame, a plurality of longitudinally arranged bus bars lying in laterally and radially divergent planes and provided with supporting mountings therefor and suitably located outwardly projecting switch contacts, supplemental contacts spaced beyond said contacts and mountings therefor; of a plurality of yokes each provided with a plurality of divergent blades coperable with said contacts in planes at right an les to the longitudinal faces of said bus ars, a supporting shaft therefor, anda series of intervening spacing clamps upon said shaft between adjacent yokes.

9. In a switch board,the combination with a series of longitudinally arranged bus bars lying in laterally and radially divergent planes and having correspondingly arranged circuit terminal devices, co-acting terminal devices spaced beyond -said terminal devices, a stationary supporting shaft, and a plurality of pivotally mounted yokes thereon provided with switch blades operable in planes at right angles to the longitudinal faces of said bus bars adapted to engageand disengage with said circuit terminal devices in pairs; of a spacing clamp secured upon said shaft between adjacent yokes, substantially as set forth. 7o

l0. In a switch board, the combination of a supporting frame, a shaft thereon, a plurality of spaced yokes pivotally mounted on said shaft provided with divergent switch blades and an operating handle, a plurality of longitudinally arranged bus bars lying in laterally and radially divergent non-coincident independent planes, insulating mountings therefor arranged' in. corresponding varying planes, switch contacts mounted at corresponding varying positions upon said frame work and in operable relation to said blades, said switch blades operating in planes at right angles to the longitudinal faces of the bus bars, and means for making electrical connection from a current conductor to said contacts, substantially as set forth.

l1. In a switch board, the combination of a supporting frame, a plurality of insulating mounts thereon located in laterally and radially divergent non-coincident independentplanes provided with longitudinally arranged bus bars having switch-blade-engaging contacts extending therefrom, co-acting contacts spaced beyond said contacts, and a pivotally mounted yoke provided withl a handle and having a plurality of divergent blades coperable with said contacts extending radially between adjacent bus bars and their mountings and operable in planes at right angles to the longitudinal faces of said bus bars.

12. In a switch board, the combination of a supporting frame, a plurality of longitudinally arranged insulating mounts thereon lying in varying divergent non-coincident independent planes each provided with a correspondingly arranged bus bar and spaced outwardly projecting contact devices, one of such contacts being in electrical connection with the bus bar and the other having means for electrical connection with a current conductor, and a rotatably mounted yoke provided with an operating handle and having a plurality of radially disposed blades extending transversely across the planes of said mounts and bars operable to make and break connection with said contacts.

13. In a switch board, the combination of a supporting frame, a plurality of longitudinally arranged insulating mounts thereon lying in varying divergent non-coincident independent planes each provided with a 125 longitudinal bus bar and laterally spaced outwardly projecting contact devices, one of such contacts being in electrical connection with the bus bar and the other having means for electrical connection with a current con- 130 i break connection with said contact devices.

14. In a switch board, 'the combination of a supporting frame, a plurality of longitudinal insulating mounts thereon located in laterally and radially divergent planes provided with correspondingly arranged bus bars having switch blade engaging contacts, corresponding contacts spaced beyond said bus bar contacts, a plurality of pivotally mounted yokes each provided with a handle and having a plurality of similarly divergent blades coperable with said contacts and extending radially between adjacent bus bars and their mountings and operable in planes at right angles to the planes of the bus bars, and a plurality of fuse panels having fuse engaging terminals mounted on said frame in operable relation to said insulating mounts.

15. In a switch board, a supporting frame having a closed front provided with a clearance aperture, a plurality of longitudinally arranged insulating mounts within the frame located in laterally and radially divergent planes provided with a corresponding plurality of bus bars having switch blade contacts, supplemental contacts on said mounts spaced beyond said contacts, and a pivotally mounted yoke having laterally and radially divergent blades coperable with said contacts in a plane at right angles to the plane of the bus bar and an operating handle extending through and operable across said clearance aperture.

16. In a switch board, a rectangular frame, a plurality of longitudinally arranged insulating mounts therein located in varying laterally and radially divergent planes provided with correspondingly arranged bus bars having outwardly projecting switch-bladeengaging contacts, supplemental contacts on said mounts spaced beyond said contacts, a plurality of pivotally mounted yokes provided with handles extending beyond the frame and divergent blades coperable with said contacts in planes at right angles to the longitudinal planes of the bus bars and extending radially between adjacent bus bars and their mountings, and covering panels on the face of the frame having a clearance opening for the yokes and handles.

17. In a switch board, the combination of a supporting frame, a shaft, a plurality of longitudinal bus bars arranged in laterally and radially divergent planes around said shaft, said bus bars being of dierent polarity, switch contacts connected to said bus bars, a plurality of switch contacts supported around beyond said bus bars and their contacts, and a yoke rotatably mounted on said shaft provided with an operating handle and a plurality of divergent blades extending through the spaces intervening between adjacent bus bars of dierent polarity and adapted to operate transversely and at right angles to the longitudinal planes thereof to make and break connections with said switch contacts.

18. In a switch board, the combination of a supporting' frame, a shaft, a plurality of longitudinal bus bars arranged in laterally and radially divergent planes around said shaft, said bus bars being of different polarity, switch contacts connected to said bus bars, a plurality of branch circuit switch contacts arranged around beyond said bus bars and their contacts, means adapted to support and insulate said bus bars and the switch contacts, a plurality of yokes rotatably mounted on said shaft each provided with an operating handle and a plurality of divergent switch blades, said blades extending through the spaces intervening between adjacent bus bars of different polarity and operating transversely and at right angles to the longitudinal planes thereof to make and break connections with said switch contacts.

19. In a switch board, the combination of a supporting frame, a plurality of longitudinal annularly arranged bus bars lying in laterally and radially divergent planes, contact devices connected to said bus bars, a plurality of branch circuit switch contact devices arranged around beyond said bus bars and their conta-ct devices, means for insulating and supporting said bus bars and the contact devices,'a plurality of rotatably mounted yokes each provided with an operating handle and a plurality ofdivergent blades, said blades extending through the spaces intervening between adjacent bus bars and adapted to operate transversely and at right angles to the longitudinal planes thereof to make and break connection with said contact devices, a plurality of inclined fuse panels having fuse devices, and means adapted to connect said fuse devices to the branch circuit switch contact devices.

20. In a switch board, the combination of a supporting frame, a shaft, a plurality of rotatable yokes mounted on said shaft, a plurality of adjustable clamps therefor mounted on the shaft between the yokes, each yoke having an operating handle and a plurality of divergent blades, a plurality of longitudinal bus bars having different polarities supported in laterally and radially divergent planes between the diver,- gent blades, contact devices connected to the bus bars and contact devices supported around and beyond said Contact devices,

said yoke blades being arranged to coincide with and to engage or disengage with the contact devices of the bus bars.

2l. In a switch board, the combination of a supporting frame, a shaft, a plurality of rotatable yokes mounted on said shaft and a plurality of adjustable clamps therefor mounted on said shaft between said yokes, each yoke having an operating handle and a plurality of divergent blades, a plurality of longitudinal bus bars supported in laterally and radially divergent planes between the divergent blades, contact devices connected to the bus bars and contact devices supported around and beyond'said contact devices, said yoke blades being adapted to engage or disengage with said contact devices, means to secure said blades to the yokes, and means facilitating the mounting or dismounting of said yokes upon said shaft.

22. In a switch board, the combination of a supporting frame, a shaft, a plurality of switch yokes mounted on said shaft, each yoke having an operating handle and a plurality of divergent blades, the coinciding blades of the yokes being of the same polarity, a plurality of longitudinal laterally and radially divergent bus bars, divergent insulator panels supported between the divergent blades. switch contact devices connected to the bus bars, and switch contact devices spaced around and in alinement with said contact devices, said blades being adapted to engage or disengage with said contact devices.

28. In a switch board, the combination of a supporting frame, a plurality of longitudinal annularly arranged bus bars located in laterally and radially divergent planes, contact devices connected to said bus bars, a plurality of branch circuit contact devices annular-ly arranged beyond said bus bar contact devices, a plurality of rotatable yokes each provided with an operating handle and a plurality of divergent blades, said blades extending through the spaces intervening between adjacent bus bars and adapted to operate transversely and at right anglesto the longitudinal planes thereof to engage or disengage with said contact devices, and means adapted to support said yokes so that the said blades will aline with said contact devices.

24. In a switch board, the combination of a supporting frame, a plurality of rotatable yokes, means for their support, said yokes having a plurality of divergent blades and an operating handle, a plurality of longitudinal bus bars arranged in laterally and radially divergent planes having clip contacts secured thereto, said bus bars and contacts being positioned about said yokes and between the divergent switch blades, means for supporting said bus bars, a plurality of circuit terminal clip contacts positioned about said bus bar clip contacts, means for their support, said blades being adapted to engage or disengage the bus bar clip contacts and the circuit terminal clip contacts.

In testimony whereof I hereunto affix my signature in the presence of a witness.

JOHN P. HAYES.

Witness FREDK. STAUB. 

